Math, asked by harshith29, 1 year ago

cos 38 × cos 52 -sin 38×sin 52

Answers

Answered by anmishatyagi
5
cos38•cos52 - sin38•sin52
= cos(38+52)
= cos 90
= 0
Answered by rita01
13
hi frnds......

cos 38 * cos 52 - sin 38 * sin 52

⇒ cos (90- 38) * cos 52 - sin (90- 38) * sin 52

⇒ sin 52 * cos 52 - cos 52 * sin 52
                                                             [ arrange ]
⇒sin 52 * cos 52 - sin 52 * cos 52

⇒ 0
hope this helps........ :D

rita01: ⇒ 0
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